Top 8 Biorxiv Papers Today in Plant Biology


2.191 Mikeys
#1. Poor seed quality, reduced germination, and decreased seedling vigor in soybean is linked to exposure of the maternal lines to drought stress
Chathurika wijewardana, K. Raja Reddy, Larry Krutz, Wei Gao, Nacer Bellaloui
Effects of environmental stressors on the parent may be transmitted to the F1 generation of plants that support global food, oil, and energy production for humans and animals. This study was conducted to determine if the effects of drought stress on parental soybean plants are transmitted to the F1 generation. The germination and seedling vigor of F1 soybean whose maternal parents, Asgrow AG5332 and Progeny P5333RY, were exposed to soil moisture stress, that is, 100, 80, 60, 40, and 20% replacement of evapotranspiration (ET) during reproductive growth, were evaluated under controlled conditions. Pooled over cultivars, effects of soil moisture stress on the parents caused a reduction in the seed germination rate, maximum seed germination, and overall seedling performance in the F1 generation. The effect of soil moisture stress on the parent induced an irreversible change in the seed quality in the F1 generation and the effects on seed quality in the F1 generation were exasperated when exposed to increasing levels of drought stress....
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biorxivpreprint: Poor seed quality, reduced germination, and decreased seedling vigor in soybean is linked to exposure of the maternal lines to drought stress https://t.co/gZolBGzbx2 #bioRxiv
biorxiv_plants: Poor seed quality, reduced germination, and decreased seedling vigor in soybean is linked to exposure of the maternal lines to ... https://t.co/BhJh2gWb10 #biorxiv_plants
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Authors: 5
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2.152 Mikeys
#2. Chloroplasts Require Glutathione Reductase to Balance Reactive Oxygen Species and Maintain Efficient Photosynthesis
Stefanie J Müller-Schüssele, Ren Wang, Desirée D Gütle, Jill Romer, Marta Rodriguez-Franco, Martin Scholz, Volker M Lüth, Stanislav Kopriva, Peter Dörmann, Markus Schwarzländer, Ralf Reski, Hippler Michael, Andreas J Meyer
Thiol-based redox-regulation is vital to coordinate chloroplast functions depending on illumination. Yet, how the redox-cascades of the thioredoxin and glutathione redox machineries integrate metabolic regulation and reactive oxygen species (ROS) detoxification remains largely unresolved. We investigate if maintaining a highly reducing stromal glutathione redox potential ( E GSH) via glutathione reductase (GR) is necessary for functional photosynthesis and plant growth. Since absence of the plastid/mitochondrial GR is embryo-lethal in Arabidopsis thaliana , we used the model moss Physcomitrella patens to create knock-out lines. We dissect the role of GR in chloroplasts by in vivo monitoring stromal E GSH dynamics, and reveal changes in protein abundances by metabolic labelling. Whereas stromal E GSH is highly reducing in wildtype and clearly responsive to light, the absence of GR leads to a partial oxidation, which is not rescued by light. Photosynthetic performance and plant growth are decreased with increasing light intensities,...
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biorxivpreprint: Chloroplasts Require Glutathione Reductase to Balance Reactive Oxygen Species and Maintain Efficient Photosynthesis https://t.co/BdC7Tx8TNx #bioRxiv
biorxiv_plants: Chloroplasts Require Glutathione Reductase to Balance Reactive Oxygen Species and Maintain Efficient Photosynthesis https://t.co/JcW21IUebW #biorxiv_plants
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Authors: 13
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2.02 Mikeys
#3. Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis.
Vicente Ramirez, Markus Pauly
Defects in the biosynthesis and/or deposition of secondary plant cell wall polymers result in the collapse of xylem vessels causing a dwarfed plant stature and an altered plant architecture termed irregular xylem (irx) syndrome. For example, reduced xylan O-acetylation causes strong developmental defects and increased freezing tolerance. Recently, we demonstrated that the irx syndrome in the trichome birefringence-like 29/eskimo1 (tbl29/esk1) mutant is dependent on the biosynthesis of the phytohormone strigolactone (SL). In this report, we show that other xylan- and cellulose-deficient secondary wall mutants exhibit increased freezing tolerance correlated with the irx syndrome. In addition, blocking SL synthesis has also a suppressor effect on these phenotypes, suggesting a more general interaction between secondary wall defects and SL biosynthesis. In contrast, SLs do not play a role in developmental defects triggered by primary wall deficiencies, suggesting that the interaction is restricted to vascular tissue. Through a reverse...
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biorxivpreprint: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/6VqMHavuiu #bioRxiv
biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv_plants
BCHEPPdepthead: RT @biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv…
alvaroffer: RT @biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv…
maximehj: RT @biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv…
rahulathe: RT @biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv…
CATSteam1: RT @biorxiv_plants: Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. https://t.co/DJE4EsBMS2 #biorxiv…
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Total Words: 7328
Unqiue Words: 2271

2.011 Mikeys
#4. Phenotyping and molecular marker analysis of WH1105 and Kharchia 65 backcrosses and F4 progenies for salinity tolerance
Varsha Varsha, Shikha Yashveer, Vikram Singh, Swati Pratap
Soil salinity is a worldwide adverse environmental factor for crop productivity and quality in arid, semiarid and coastal areas. In India, approximately 8.5 million hectare of land area is affected by high salinity (EC ≥ 5 dS m-1). Development of salinity tolerant varieties through marker assisted breeding is most efficient and effective strategy for management of soil salinity. WH 1105 is widely cultivated wheat variety with many agronomically superior qualities but is affected by soil salinity. Two genes ( Nax1 and Nax2 ) for salinity tolerance were introgressed from Kharchia 65 into the genetic background of WH 1105 through marker assisted backcross breeding. BC1F3, BC2F2 and F4 generations of the cross WH1105 x Kharchia 65 were evaluated for various morphological traits under initial salt stress condition. On the basis of phenotypic and genotypic variations 44 high yielding plants were selected from the cross. Out of 178 SSRs tested, 30 were found polymorphic for background selection of the foreground selected plants. Cluster...
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biorxivpreprint: Phenotyping and molecular marker analysis of WH1105 and Kharchia 65 backcrosses and F4 progenies for salinity tolerance https://t.co/8vI7xNKBTL #bioRxiv
biorxiv_plants: Phenotyping and molecular marker analysis of WH1105 and Kharchia 65 backcrosses and F4 progenies for salinity tolerance https://t.co/rATl8LAFIo #biorxiv_plants
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2.0 Mikeys
#5. Bipartite anchoring of SCREAM enforces stomatal initiation by coupling MAP Kinases to SPEECHLESS
Aarthi Putarjunan, Jim Ruble, Ashutosh Srivastava, Chunzhao Zhao, Amanda L Rychel, Alexander K Hofstetter, Xiaobo Tang, Jian-Kang Zhu, Florence Tama, Ning Zheng, Keiko U Torii
Cell-fate in eukaryotes is regulated by MAP Kinases (MAPKs) that translate external cues to cellular responses. In plants, two MAPKs, MPK3/6, regulate diverse processes of development, environmental response, and immunity. Yet, the mechanism bridging these shared signaling components with a specific target remains unresolved. Focusing on the development of stomata, epidermal valves for gas exchange and transpiration, we report here that the bHLH protein SCREAM functions as a scaffold by recruiting MPK3/6 to downregulate SPEECHLESS, a transcription factor initiating stomatal cell lineages. SCREAM directly binds with MPK3/6 through an evolutionarily-conserved yet unconventional bipartite motif. Mutations in this motif abrogate association, phosphorylation and degradation of SCREAM, unmask hidden non-redundancies between MPK3 and MPK6, and result in uncontrolled stomatal differentiation. Structural analyses of MPK6 at the 2.75A resolution unraveled bipartite binding of SCREAM with MPK6, that is distinct from an upstream MAPKK. Our...
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PromPreprint: Bipartite anchoring of SCREAM enforces stomatal initiation by coupling MAP Kinases to SPEECHLESS https://t.co/lFq5pxrpqg
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1.996 Mikeys
#6. From bud formation to flowering: transcriptomic state defines the cherry developmental phases of sweet cherry bud dormancy
Noémie Vimont, Mathieu Fouché, José Antonio Campoy, Meixuezi Tong, Mustapha Arkoun, Jean-Claude Yvin, Philip A Wigge, Elisabeth Dirlewanger, Sandra Cortijo, Bénédicte Wenden
Bud dormancy is a crucial stage in perennial trees and allows survival over winter to ensure optimal flowering and fruit production. Recent work highlighted physiological and molecular events occurring during bud dormancy in trees and we aimed to further explore the global transcriptional changes happening throughout dormancy progression. Using next-generation sequencing and modelling, we conducted an in-depth transcriptomic analysis for all stages of flower buds in sweet cherry (Prunus avium L.) cultivars displaying contrasted stages of bud dormancy. We observed that buds in organogenesis, paradormancy, endodormancy and ecodormancy stages are characterised by specific transcriptional states, associated with different pathways. We further identified that endodormancy can be separated in several phases based on the transcriptomic state. We also found that transcriptional profiles of just seven genes are enough to predict the main cherry tree flower bud dormancy stages. Our results indicate that transcriptional changes happening...
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Authors: 10
Total Words: 12164
Unqiue Words: 3881

1.946 Mikeys
#7. Metabolic labeling of RNAs uncovers hidden features and dynamics of the Arabidopsis thaliana transcriptome
Emese Xochitl Szabo, Philipp Reichert, Marie-Kristin Lehniger, Marilena Ohmer, Marcella de Francisco Amorim, Udo Gowik, Christian Schmitz-Linneweber, Sascha Laubinger
Transcriptome analysis by RNA sequencing (RNA-seq) has become an indispensable core research tool in modern plant biology. Virtually all RNA-seq studies provide a snapshot of the steady-state transcriptome, which contains valuable information about RNA populations at a given time, but lacks information about the dynamics of RNA synthesis and degradation. Only a few specialized sequencing techniques, such as global run-on sequencing (GRO-seq), have been applied in plants and provide information about RNA synthesis rates. Here, we demonstrate that RNA labeling with a modified, non-toxic uridine analog, 5-ethynyl uridine (5-EU), in Arabidopsis thaliana seedlings provides insight into the dynamic nature of a plant transcriptome. Pulse-labeling with 5-EU allowed the detection and analysis of nascent and unstable RNAs, of RNA processing intermediates generated by splicing, and of chloroplast RNAs. We also conducted pulse-chase experiments with 5-EU, which allowed us to determine RNA stabilities without the need for chemical inhibition...
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1.931 Mikeys
#8. Genome-wide analysis of MIKC-type MADS-box genes in wheat: pervasive duplications may have facilitated adaptation to different environmental conditions
Susanne Schilling, Alice Kennedy, SiRui Pan, Lars Sommer Jermiin, Rainer Melzer
Background: Wheat (Triticum aestivum) is one of the most important crops worldwide. Given a growing global population coupled with increasingly challenging climate and cultivation conditions, facilitating wheat breeding by fine-tuning important traits such as stress resistance, yield and plant architecture is of great importance. Since they are involved in virtually all aspects of plant development and stress responses, prime candidates for improving these traits are MIKC-type (type II) MADS-box genes. Results: We present a detailed overview of number, phylogeny, and expression of 201 wheat MIKC-type MADS-box genes, which can be assigned to 15 subfamilies. Homoeolog retention is significantly above the average genome-wide retention rate for wheat genes, indicating that many MIKC-type homoeologs are functionally important and not redundant. Gene expression is generally in agreement with the expected subfamily-specific expression pattern, indicating broad conservation of function of MIKC-type genes during wheat evolution. We find...
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